Solve: a 100-ml pitcher of lemonade is currently 90% water and 10% lemon concentrate. how much water must you add to change the ballance to 95% water and 5% lemon concentrate.

Must add 100 milliliters of water

Step-by-step explanation:

Let

x ----> milliliters of water to add

we know that

Originally

The milliliters of lemon concentrate is equal to the 10% of 100 mL

so

Now

The balance of lemon concentrate is equal to 5%

The milliliters of lemon concentrate is the same

so

solve for x

therefore

Must add 100 milliliters of water

pentagon

step-by-step explanation:

the coordinates   a(5, -2), b(3,-1),c(-4,-4) d(-3,8) and e(-1,4) forms the vertices of the polygon when they are connected in order.

in order to classify that which polygon is it with the given coordinates, first count the number of vertices and then count the number of sides it can make with these vertices.

since, the given coordinates have five vertices, therefore, it will make five sides. moreover, pentagon is regular in nature therefore it will be convex.

now, a polygon with five sides is known as pentagon, therefore, the given polygon is the pentagon.

12cm

the answer is d